To provide a liquid quantification and discharge apparatus and its production method and a method for quantifying and discharging liquid and a method for discharging the fixed number of particles, by which a small quantity of liquid can be quantified and discharged at a high accuracy with its simple and compact configuration and the fixed number of particles can be discharged by quantification and discharge of a solution containing particles dispersed therein.

Liquid to be discharged is injected from a first channel 1 with differences in affinity between the inner wall of a channel and the liquid to be discharged and between the liquid to be discharged and an object to which the liquid is discharged. A second channel 2 having higher affinity for liquid to be discharged 14 than that of the first channel 1 is preferentially filled. A terminal opening part 4 of the second channel 2 is caused to come into contact with another object 5 having higher affinity for the liquid to be discharged 14 than that of the second channel 2. Thus, the liquid 14, the quantity of which is defined by the volume of the second channel 2, is discharged to the object 5.